Hi Andrew - Thanks for the suggestion. Sadly, I have to support a large user-base of people still running 10.4, otherwise I would definitely have gone for the NSHashMap. :P
Best, JB On Sat, Nov 8, 2008 at 12:33 AM, Andrew Merenbach <[EMAIL PROTECTED]> wrote: > Greetings, Jonathan, > > If you can afford to target 10.5+ only, you can use an NSMapTable, which is > a mutable type of collection "modeled after NSDictionary" but "can contain > arbitrary pointers (its contents are not constrained to being objects)"; it > can also "hold weak references to its keys and/or values." It's probably a > little more friendly than using CFMutableDictionary. Hope this helps! > > Cheers, > Andrew > > On Nov 7, 2008, at 9:12 PM, Jonathan Bailey wrote: > >> Hi Michael - >> >> Thanks much for your response. I actually did originally intend to use >> an STL map, but I couldn't get it to work. It seemed that when I added >> a C++ object to a map declared as an instance variable within my >> ObjC++ class's header file, this generated an "EXC_BAD_ACCESS" signal >> - and no exception thrown. As a test, I created a temp STL map in the >> implementation/.mm file for this class, and added my C++ object to >> that map and it seemed to work fine. So I assumed that templated >> classes weren't supported as instance variables for an ObjC++ class. >> >> I'll definitely investigate using CFMutableDictionary instead if >> indeed STL won't work for instance variables. >> >> Thanks, JB >> >> >> On Fri, Nov 7, 2008 at 10:29 PM, Michael Ash <[EMAIL PROTECTED]> >> wrote: >>> >>> On Fri, Nov 7, 2008 at 8:41 PM, Jonathan Bailey <[EMAIL PROTECTED]> >>> wrote: >>>> >>>> Hi all - >>>> >>>> I am trying to find a way to create a dynamically-growable objective C >>>> data structure within objective C++ code, such as a >>>> NSMutableDictionary, that can store values that are pointers to an >>>> objective C++ or straight-up C++ object. >>>> >>>> NSMutableDictionary seems to only accept pointers to objective C >>>> objects, however, and not to arbitrary objects. This seems like a >>>> simple thing to do but I am a bit stumped. Does anyone know of a way >>>> to do this? >>> >>> CFMutableDictionary will accept arbitrary pointers, and allows you to >>> provide callbacks so that it knows how to work with them. >>> >>> As an added bonus, CFMutableDictionary is "toll-free bridged" to >>> NSMutableDictionary, meaning that you can simply cast the pointer and >>> use it. The bridging is not 100% with custom callbacks, as there are >>> parts of the NSMutableDictionary API which assume that you are storing >>> only Objective-C objects, but for dictionaries which actually are >>> storing Objective-C objects it's very useful. This also means that you >>> can store it in other Cocoa collections like NSArray, other >>> NSDictionaries, etc. >>> >>> And note that if you're using Objective-C++, there's nothing >>> preventing you from using STL collections for this sort of thing, if >>> they do what you like. >>> >>> Mike >>> _______________________________________________ >>> >>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>> >>> Please do not post admin requests or moderator comments to the list. >>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>> >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/cocoa-dev/jonb%40drumwell.net >>> >>> This email sent to [EMAIL PROTECTED] >>> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> >> http://lists.apple.com/mailman/options/cocoa-dev/andrew.merenbach%40ucla.edu >> >> This email sent to [EMAIL PROTECTED] > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
